US1160118A - Valve. - Google Patents

Description

A. ABSALOM' & w. H. CQLEY.

VALVE.

APPLICATRON FILEDVIAY 25', I915.

Patented Nov. 16, 1 935.

witmeooco ARTHUR'IABSIAILOM ANDWADEH. COLE-Y, or MONTGOMERY, wnsr VIRGINIA.

VALVE.

Specification of Letters Patent.

Patented Nov, 16, 1915;

Application filed May 25, 1915;, Serial-No. 30,420.

county of Fayette and State of West Vin.

"ginia, have invented new and useful Improvements in Valves, of which the following is a specification.

The invention relates to cut-oft valves, and more particularly to the class of automatic cut-ofi' safety valves I I The primary object of the invention is the provision of a valve structure of this character wherein, when the main for supplying the gas to the service pipe has been once cut oil, it' necessitatesthe manual opening of the valve before the supplygcan be had at the points of consumption from the service pipe, and the instant the gas pressure is cut off in he main the valve automatically closes ,so as to avoid any possibility of the escape of gas from the points of consumption when the main is again turned on.

Another object of the invention is the provision of a valve of this character wherein the construction thereof is novel in form to assure perfect safety and the automatic operation thereof, so as to eliminate any possibility-0f asphyxiation or. explosion resulting from inadvertencein leaving the service pipe open at the points of consumption of the gas. Y I

A still further object of the invention is the provision of a valve of this character 'which is extremely simple in construction, reliable andefiic ent in operation, and inexpensive in manufacture.

Vith these and other objects in view, the invention consists in the construction, combination and arrangement of partsas Will be hereinafter fully described, illustrated in the accompanying drawing, and pointed out in. the claims hereunto appended.

. In the drawings:Figure 1is an enlarged vertical sectional view through a valve constructed in accordance with the invention. Fig. 2 is a horizontal transverse sectional view through the pressure chamber in the diaphragm shell or casing, Fig. 3.is a frag mentary vertical sectional view at right angles to the section shown in Fig. 1v of the drawings. I

Similar reference characters indicate corre -V1ew in the drawings.

, onding parts *throughoutthe several Referring to the drawings in detail, A designates a gas service pipe, which as usual constitutes ,the house or interior system for the consumption of gas fo r lighting, heating, or the like, and is supplied with the gas from a main in the ordinary well-known manner, while connected to the service pipe between the points 'Of-CODSQIIIPtlOII and a meteris the automatic cut-off safety valve structure B hereinafter fully described.

The valve structure B comprises a valve casing 10 communicating at both sides with the service ,pipe A, and is formed therein With" a partition 11 provided with a valve seat 12, as usual, in which is adapted to engage avalve 13 having the respective 'to'p and bottom guide Wings 14 and 15. The

a cap 17,. while adapted-to.

spring-tensioned hand-controlled pl nges?" 18 adapted to unseat the valve 13, and worlg ing through a stutfing box or gland 19 lo cated centrally and at the bottom of the valve casing. i

Tapped in the cap 17 on the valve casing 10 is a coupling nipple .20 which has also engaged therewith a diaphragm shell or casing 21 which has-fixed therein a flexible dia phragm 22 dividing the shell or easing into a pressure chamber 23 and an air chamber 2%, respectively, the latter being adapted for communication with the atmosphere through a suitable port formed-in the upper portion of the shell or casing-21 and this'port is normally closedby means of a screw 25, while communication between the pressure chamber 23 and the valve casing 10 is had through the nipple so t1 at when the valve 13 is-seated and the supply of gas from the main is turned on it will flow into the pressure chamber 23 for the lifting of the dia- .phragm scribed. I Within the pressure chamber 23 and engaged in the nipple 20 are spaced parallel bearings 26 between which are arranged gripping jaws 27 supported upon the pivots 28 which are mounted: in the said bearings, and near the outer ends of these jaws are connected links 29, the same being connected with a fork hanger 30 secured centrally in the diaphragm 22, the innereends of the gripping jaws being formed with notched gripping surfaces 31, and between thegripn; eiidsoLthese jaws is passed a valve '22 for; a purpose presently de-' stem 32 which is connected in the top wings 14 of the valve 13 so that on the lifting of the diaphragm 22 under gas pressure within the pressure chamber 23 the jaws 27 will be moved into positive lockingengagement with the valve stem 32, thereby holding the valve, 13 positively closed by engagingthc seat 12 for shutting 011' the flow of gas through the service'pipe A from the inletto' the outlet sides thereof, or to the points of consumption of the gas. In other words, the

valve 13 is normally held seated by'gra'vity" and also by the presence of pressure playing against the top of the said valve. Now,

when the pressure plays against the diaphragm it causes the jaws 27 to lock with the stem 32, thus positively holding the valve closed. When it is desired to permit the flow of gas through the service pipe A the plunger 8 is manually lifted against the resistance of its spring, which forces the valve 13 away from its seat, and at this instance the pressure of the gas upon the diaphragm 22 acts thereon to still maintain the jaws in gripping position, thereby holding the valve in positive open position so that the free flow of gas may be had through the Copies of this patent may be obtained for service pipe. In event that the gas pressure is cut off from the main, thereby shutting it off from the service pipe, the diaphragn'i' 22 is lowered by the reduction of gas pressure, thus releasing the jaws 27 from gripping engagement with the stem 32, and by the weight of the valve 13 it automatically lowers for engagement in the seat 12, thereby shutting off the gas supply through the main when the same is again turned on to the service pipe;

From the connection with the accompanying drawings, the construction and manner of operation of the device will be clearly understood, and therefore a more,exten'ded explanation has been omitted.

What is claimed is:

1. The combination with a valve casing foregoing description, taken in and a valve therein, a cap engaged in the valve casing, a coupling nipple threaded 1n the cap, a diaphragm shell mounted upon the nipple, a flexible diaphragm within the shell and'dividing the same into pressure and air chambers, a valve stem on the valve and extended through the cap andnipple to protrude within the pressure chamber in the shell, gripping jaws pivotally supported within the pressure chamber and located op posite each other, a forked hanger mounted centrally in thediapliragm, and links piv otally connected to the gripping jaws and also to the respective limbs of the fork to actuate the gripping jaws for gripping the valve stem on pressure being exerted against the flexible diaphragm.

2. The combination with a v alve casing and a valve therein, acap'engaged in the.

valve casing, a coupling nipple threaded inthe cap, a diaphragm shell mounted'upon' the nipple, a flexible diaphragm within the shell and dividing the same intopressureand air chambers, auvalve stem on the valve .and extended through the cap and nipple to pressure chamber within the diaphragm shell.

' In testimony. whereof I afiix my signature in presence of two witnesses.

ARTHUR ABSALOM. WADE H. COLEY.

Witnesses:

'R. M. HOLSTINE,

E. PERCIVAL.

five cents each,by addressing the Commissioner of Patents,

Washington, D. G.

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